Q: I have the check engine light on and checked for DTC's it says ECM set and CEM set

If the vehicle needs all the ball joints replaced, I would recommend having that done by a professional to see if the noise goes away. The sound is likely occurring due to the excess amount of play in the front...

Hello. Too much transmission fluid sometimes causes slipping in the transmission, but usually causes seals to blow or fail prematurely. It sounds like your car may have a misfire condition. This means that one or more of your spark plugs...

Your Jetta's engine is what is known as an "interference" motor which means that when the timing belt breaks, the valve train typically will sustain major damage. This usually involves bent valves and many other problems and can be very...

The problem sounds like the alternator stopped charging. The battery being dead may have overloaded the alternator since they are designed to maintain the battery and run the accessories, not recharge a battery and run all the accessories. I would...

Hi There, This may be related to a faulty throttle position sensor or potentially a dirty or failing mass air flow sensor. The mass air flow sensor (https://www.yourmechanic.com/services/mass-airflow-sensor-replacement) monitors air intake as it is mixed with fuel prior to being...

Hi there. The code P0303 (https://www.yourmechanic.com/article/p0303-obd-ii-trouble-code-cylinder-3-misfire-detected-by-spencer-clayton_2) means that cylinder number 3 has a misfire. There are three ways that the cylinder number 3 can be misfiring. Spark plug is fouled out and not creating a strong enough spark to ignite...

This may be related to a failing power steering pump (https://www.yourmechanic.com/services/power-steering-pump-replacement) or low power steering fluid (https://www.yourmechanic.com/services/power-steering-fluid-service) levels. As you may know, the power steering system uses a pump, normally driven by a belt. The pump supplies pressure as it...

This problem is due to electrical connections on one or more computers in the vehicle. Try to disconnect and reconnect all the ECU,s one at a time and inspect the connectors for loose or corroded connections. The connections are known...

The term "rear main seal" normally refers to the crankshaft rear main oil seal. If that is the seal you are referring to, improper towing would have zero effect on that seal. Furthermore, if that is the seal you are...